Mixing of zeolite powders and molten salt

Conference · Wed May 01 04:00:00 EDT 1996

OSTI ID:230400

Pereira, C; Zyryanov, V N; Lewis, M A; Ackerman, J P

Transuranics and fission products in a molten salt can be incorporated into zeolite A by an ion exchange process and by a batch mixing or blending process. The zeolite is then mixed with glass and consolidated into a monolithic waste form for geologic disposal. Both processes require mixing of zeolite powders with molten salt at elevated temperatures (>700 K). Complete occlusion of salt and a uniform distribution of chloride and fission products are desired for incorporation of the powders into the final waste form. The relative effectiveness of the blending process was studied over a series of temperature, time, and composition profiles. The major criteria for determining the effectiveness of the mixing operations were the level and uniformity of residual free salt in the mixtures. High operating temperatures (>775 K) improved salt occlusion. Reducing the chloride levels in the mixture to below 80% of the full salt capacity of the zeolite significantly reduced the free salt level in the final product.

• Research Organization: Argonne National Lab., IL (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 230400
• Report Number(s): ANL/CMT/CP--88168; CONF-9604124--3; ON: DE96010799
• Country of Publication: United States
• Language: English

Related Subjects

05 NUCLEAR FUELS
ALPHA-BEARING WASTES
CERAMICS
CHLORIDES
ELECTROMETALLURGY
RADIOACTIVE WASTE PROCESSING
SOLIDIFICATION
SPENT FUELS
VITRIFICATION
WASTE FORMS
ZEOLITES